TWI896125B - Evaluation method for objectively evaluating the performance of fishing rods - Google Patents

Abstract

The present invention provides a method for objectively evaluating the performance of a fishing rod by visualizing the characteristics of the rod corresponding to its actual use and movement, using dynamic data from the use of a fishing rod. One embodiment of the present invention employs an evaluation method that calculates the bending stiffness (EI) of the fishing rod at various locations between the tip and the butt of the rod; calculates the curvature of the rod at various locations between the tip and the butt of the rod when the rod is in use; calculates the distance between each of these locations and the line of action of the rod tip; and, based on the bending stiffness (EI), the curvature, and the distance, calculates the tension acting on the rod tip through the fishing line when the rod is in use; and displays the dynamic changes in the tension along with the rod.

Description

Evaluation method for objectively evaluating the performance of fishing rods

The present invention relates to an evaluation method for objectively evaluating the performance of a fishing rod, and more particularly to an evaluation method for visually evaluating the performance of a fishing rod.

Fishing rods require various properties. Among the important properties considered in fishing rod design are objective properties that can be measured objectively, such as the bending stiffness and torsional stiffness of the rod body.

While these objective characteristics of a fishing rod are quantitative, they do not reflect the actual motion of the rod, meaning they are not dynamic evaluations. Therefore, it is difficult to objectively evaluate the performance of a fishing rod using these characteristics. Furthermore, in order to perform this dynamic evaluation, there is also the problem of how to represent (display) the objective characteristics of a fishing rod.

Historically, attempts have been made to objectively evaluate the performance of fishing rods. For example, Japanese Patent Application Laid-Open No. 2013-153740 (Patent Document 1) discloses a design system for designing long, resin tubular or plate-shaped members using sensory evaluation based on the quantification of physical elements.

However, the method of Patent Document 1 may not accurately reflect the dynamic changes of a fishing rod during actual use and movement, making it difficult to objectively evaluate the performance of the fishing rod. Furthermore, there is the inherent problem of being unable to visually grasp dynamic changes.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Publication No. 2013-153740

One of the objectives of this invention is to provide an evaluation method that uses dynamic data of a fishing rod to visualize the characteristics of the fishing rod corresponding to the actual usage status and movement of the fishing rod, thereby objectively evaluating the performance of the fishing rod.

Other objects of the present invention will become apparent by referring to this entire specification.

An evaluation method according to one embodiment of the present invention calculates the bending stiffness (EI) of a fishing rod at various locations between the tip and the butt of the rod; calculates the curvature of the rod at various locations between the tip and the butt of the rod when the rod is in use; calculates the distance between each of the locations and the line of action of the rod tip; and based on the bending stiffness (EI), the curvature, and the distance, calculates the tension acting on the rod tip through the fishing line when the rod is in use; and displays the dynamic changes in the tension along with the rod.

An evaluation method according to one embodiment of the present invention calculates the bending stiffness (EI) of a fishing rod at various positions from the tip to the butt of the rod based on multiple conditions, including the load acting on the rod tip and the angle at which the rod is held.

In an evaluation method according to one embodiment of the present invention, a display color of a color map assigned based on the calculated tension value is dynamically displayed on the aforementioned fishing line connected to the aforementioned fishing rod. Furthermore, in an evaluation method according to one embodiment of the present invention, a usage range of the display color is set by setting a value for the display color of the color map.

In the evaluation method of one embodiment of the present invention, the aforementioned setting value is set to be different according to at least one of the fishing action or the fishing type.

In the evaluation method according to one embodiment of the present invention, the aforementioned fishing action is the casting action of the aforementioned fishing rod.

In the evaluation method of one embodiment of the present invention, the aforementioned fishing action is the operation of the fishing rig or bait provided on the aforementioned fishing rod.

In the evaluation method of one embodiment of the present invention, the aforementioned fishing action is the aforementioned action of raising the fishing rod.

In the evaluation method of one embodiment of the present invention, the aforementioned fishing action is the aforementioned stationary action of the fishing rod.

In the evaluation method of one embodiment of the present invention, the aforementioned fishing action is the pulling action of the aforementioned fishing rod.

In the evaluation method of one embodiment of the present invention, the aforementioned fishing action is the aforementioned fishing rod's action of catching a fish.

In an evaluation method according to an embodiment of the present invention, the fishing rod comprises a plurality of fishing rods. Furthermore, in an evaluation method according to an embodiment of the present invention, the dynamic changes in tension are displayed along with the fishing rod, and at least one of the dynamic changes in curvature or the dynamic changes in strain energy at various positions of the fishing rod are displayed along with the fishing rod. Furthermore, in an evaluation method according to an embodiment of the present invention, the dynamic changes in tension are displayed along with the fishing rod in two or three dimensions.

An evaluation method according to an embodiment of the present invention calculates the bending stiffness (EI) of a fishing rod at various positions between the tip and the butt of the fishing rod; obtains the coordinates of the various positions between the tip and the butt of the fishing rod and the coordinates of a fishing group connected to the fishing rod; calculates the curvature of the various positions between the tip and the butt of the fishing rod when the fishing rod is used; calculates the distance between the various positions and the line of action of the tip of the fishing rod; and calculates the bending stiffness (EI) of the fishing rod, the curvature, and the distance based on the bending stiffness (EI), the curvature, and the distance. The method comprises: determining the tension exerted by the fishing line on the tip of the fishing rod when the fishing rod is in use; obtaining the holding length of the fishing rod; calculating the support force for maintaining the rod's position when the fishing rod is in use based on the tension, the distance from the rod end to the line of action acting on the rod tip, and the holding length; and displaying the dynamic changes in the support force on the holding position of the fishing rod or on a virtual arm for maintaining the rod's position (a virtual arm for maintaining the rod, located at the position where the angler maintains the rod).

This embodiment of the present invention provides a method for objectively and accurately evaluating the performance of a fishing rod by visualizing its characteristics corresponding to its actual usage and movements using dynamic data of the fishing rod.

1: Measurement system

8: Marking

10: Fishing Rod

20: Lead Hammer

30: Measuring camera

40: Information processing device

41: Communications Department

42: Control Unit (Calculation Unit)

43: Memory

44: Display unit

100:Evaluation System

SA1~SA5, SB1~SB7, SA~SF: Steps

Figure 1 is a diagram showing the overall structure of a measurement system according to one embodiment of the present invention.

Figure 2 is a diagram illustrating the overall structure of an evaluation system according to one embodiment of the present invention.

FIG3 is a diagram showing a flow chart for calculating the characteristics of a fishing rod in an evaluation system according to one embodiment of the present invention.

FIG4 is a diagram showing the process of visualizing the tension acting on the tip of a fishing rod through a fishing line in an evaluation method according to one embodiment of the present invention.

FIG5 is a diagram showing the process of visualizing the support force of a fishing rod in a method for evaluating an embodiment of the present invention.

FIG6A is a diagram showing an example of visualizing the tension acting on the tip of a fishing rod through a fishing line, in an evaluation method according to one embodiment of the present invention.

FIG6B is a diagram showing an example of visualizing the tension acting on the tip of a fishing rod through a fishing line, in an evaluation method according to an embodiment of the present invention.

FIG7A is a diagram showing an example of visualizing the support force of a fishing rod in a method for evaluating an embodiment of the present invention.

FIG7B is a diagram showing an example of visualizing the support force of a fishing rod in a method for evaluating an embodiment of the present invention.

The following describes various embodiments of the present invention with reference to the accompanying drawings. Components common to the various drawings are denoted by the same reference symbols. It should be noted that the drawings are for illustrative purposes only and are not necessarily to scale.

Figure 1 schematically illustrates the overall configuration of a measurement system 1 that measures various data to calculate the tension and support force of a fishing rod used in the evaluation method of the present invention. As shown in Figure 1 , measurement system 1 comprises a fishing rod 10 with predetermined marks 8 applied at various locations on the rod, a lead hammer 20 mounted on one end of rod 10, and a camera 30 that captures the marks 8. As the operator holds rod 10 and engages in fishing, camera 30 captures the marks 8 and measures changes in the overall rod and the positions of the marks.

Here, the measuring system 1 can be connected to an information processing device (not shown). Furthermore, the measuring system 1 can be further configured to include a holding device for the fishing rod 10. Furthermore, the measuring system 1 can be combined with other devices other than the fishing rod 10, hammer 20, and camera 30.

In this manner, the illustrated measuring system 1 detects the speed, acceleration, and coordinates of the fishing rod 10 at various rod positions during use. It then calculates the curvature based on the coordinates of each rod position and the distance from each rod position to the rod's line of action. The tension of the fishing rod 10 is calculated based on the curvature and stiffness based on the coordinates of each rod position and this distance. Furthermore, the supporting force of the fishing rod 10 is calculated based on this tension and the distance from the rod's butt to the line of action acting on the rod tip. The dynamic changes in the tension acting on the rod tip through the fishing line, or the supporting force that maintains the rod's position, are displayed on the information processing device along with the aforementioned fishing rod, thereby evaluating the performance of the fishing rod. Additionally, alternative methods to calculating time-series data should be considered, such as connecting a measuring device to the other end of the fishing line for direct measurement, and using a measuring device to directly measure the support force that maintains the rod's position. Further details are provided below.

Referring to FIG2 , an evaluation system 100 for evaluating the performance of a fishing rod according to an embodiment of the present invention will be described. FIG2 is a block diagram of the overall configuration of evaluation system 100 for evaluating the performance of a fishing rod according to an embodiment of the present invention. As shown, evaluation system 100 according to an embodiment of the present invention comprises the aforementioned measurement system 1 and an information processing device 40 connected to measurement system 1. The information processing device 40 is configured to include: a communication unit 41 for transmitting and receiving measurement data with the measurement system 1; a control unit (calculation unit) 42 for calculating, in addition to the later-described stiffness (EI) and curvature, other fishing rod characteristics such as tension and support force; a memory unit 43 for storing the measurement data and the rod characteristics; and a display unit 44 for displaying the measurement data and the rod characteristics. The information processing device 40 is conceivable, but is not limited to, a computer, smartphone, wearable terminal, game console, or cloud system.

Next, referring to FIG3 , a method for evaluating the performance of a fishing rod according to an embodiment of the present invention will be described. As shown in the figure, in the evaluation method according to an embodiment of the present invention, first, a method for calculating the stiffness (EI) based on the coordinates of each position of the fishing rod 10 by the control unit (calculation unit) 42 of the above-mentioned information processing device 40 will be described. Specifically, first, a plurality of conditions (e.g., five different conditions) are set to determine the load acting on the fishing rod (the first section) and the angle at which the fishing rod is held, and the static load under each condition is measured (step SA1). For example, as condition 1, consider maintaining an angle of 0 degrees and a load of 0 kgf (to obtain the distance between the marks). As condition 2, consider maintaining an angle of 60-70 degrees and a light load (a condition in which the rod tip bends first). As condition 3, consider maintaining an angle of 50 degrees and a load greater than condition 2 (a condition in which the rod tip bends first from the tip to the center). As condition 4, consider maintaining an angle of 40-50 degrees and a load greater than condition 3 (a condition in which the rod tip bends from the rod tip to the center). As condition 5, consider maintaining an angle of 30-40 degrees and a maximum load (a condition in which the rod tip bends).

Next, the measurement data obtained in the above steps is edited (step SA2). More specifically, as needed, the measurement data is linked, missing measurement data is corrected, measurement data is replaced, and the order of the various rod positions is changed. Next, the load curve is confirmed (step SA3). Here, the load curve refers to the state (bend state) of the fishing rod when a load is applied (the same applies throughout this manual). Afterwards, the coordinate data of each position of the fishing rod 10 is output (step SA4). Next, the radius of curvature at each position is calculated based on conditions 2 to 5 above, and the rigidity (EI) based on the coordinates of each position of the fishing rod 10 is calculated (step SA5).

Next, the method for calculating the curvature based on the coordinates of each position of the fishing rod 10, performed by the control unit (calculation unit) 42 of the aforementioned information processing device 40, will be described. First, the actual change (temporal change) of the coordinates of each position caused by the movement of the fishing rod is measured (Step SB1). Next, the measured data is edited (Step SB2). More specifically, as needed, the measurement data is combined, measurement data defects are corrected, measurement data is replaced and corrected, and the order of the various positions of the fishing rod is changed. Next, the edited measurement data is verified (Step SB3). Here, verifying the edited measurement data means checking for noise and whether the assumed load curve is displayed. Next, the time series data for the coordinates of each position of the fishing rod 10 and the coordinates of the fishing gear are output (step SB4). Furthermore, the coordinates of the fishing gear are necessary in order to calculate the line of action of the force applied to the fishing rod and the distance from each mark (each position) to the line of action. Here, the line of action of the force applied to the fishing rod refers to the straight line connecting the rod tip and the force point (fishing gear, hammer, bait, etc.). Next, based on the output time series data for the coordinates of each position of the fishing rod 10, time series data for the curvature of each position of the fishing rod 10 is calculated (step SB5). Based on the output time series data of the coordinates of each position of the fishing rod 10 and the coordinates of the fishing set, the distance from each marker (position) to the line of action is calculated (step SB6). Furthermore, in corresponding situations, the time series data of the coordinates of the position (marker) of the damaged rod tip is captured (step SB7). Furthermore, the retained length of the fishing rod 10 is captured. Here, the retained length of the fishing rod 10 refers to the length of the rod held from the tip of the rod when the fish is being fished. This can be determined by measuring the length of the rod held from the tip of the rod when the fish is being fished. (The actual retained length is also determined by factors such as the type of fish being fished, the length of the rod, the rod's tuning, the conditions of the fishing spot, and the angler's sensitivity.)

When calculating curvature, as the load applied to the rod shifts toward the base, the curvature at the tip of the rod changes less. Similarly, the curvature at the base of the rod also changes less. Therefore, even simply selecting three closely spaced marking positions for calculation can sometimes lead to larger calculation errors due to measurement errors. Therefore, selecting the optimal three marking positions for calculation results in a time series of angles at these three points forming a smooth curve, enabling accurate curvature calculation. A fishing rod can be constructed by connecting multiple rod sections, such as the base, middle, and tip sections, or from a single rod section. In either case, it is ideal to set at least three marking positions on each rod section.

Next, the control unit (computation unit) 42 of the information processing device 40 calculates time-series data of the tension acting on the tip of the fishing rod 10 via the fishing line based on the calculated coordinates of each position of the fishing rod 10 (EI), the calculated curvature at each position of the fishing rod 10 (also calculated), and the distance from each rod mark (position) and the rod tip (rod tip mark) to the line of action (step SC). Furthermore, time-series data of the support force at the held position of the fishing rod 10 is calculated based on the time-series data of the tension acting on the tip of the fishing rod 10 via the fishing line, the distance from the rod tip to the line of action, and the held length of the fishing rod 10 (step SD). Here, rod tension refers to the tension applied to the tip of the fishing rod 10 via the fishing line, and rod support refers to the support provided by the angler to the rod in the position in which the rod is held to operate it. These tension and support vary depending on the performance of the fishing rod and are therefore useful information when evaluating rod performance. Furthermore, to reduce noise, the marking positions used to calculate the tension and support applied to the line can be calculated using, for example, markings at the tip of the rod, where the curvature is greatest, and at the center, where the bend is greatest.

Here, regarding casting, the tip of the rod is prone to vibration due to different tensions (usually 200mm from the front end is used as a reference, but it depends on the situation of the rod). Although the maximum curvature of the tip of the rod is likely to increase, the vibration mode is large, and this influence can make it difficult to calculate the correct tension. Furthermore, because the curvature is smaller toward the rear of the rod center, the calculated value tends to be less reliable (depending on the rod type). For example, the rod base is prone to measurement errors, making it sometimes unusable. Furthermore, when fighting a fish, the tip of the rod is prone to being extended, and changes in tension are reflected from the center to the rod base. Again, this is a point where measurement errors are more likely to occur at the rod base, making it sometimes unusable. Therefore, while tension can be calculated for each marker position based on the EI and curvature at each marker position, as well as the distance from each marker to the line of action, it has been found that it is more appropriate to capture the tension at the marker position with the greatest curvature and integrate the calculated values (when the movement is static). On the other hand, activities such as fishing or reeling in a line shake will particularly cause vibration at the rod tip, so it is conceivable that the maximum curvature may not be applicable. Therefore, for example, when casting, it is better to choose the tension calculated from the mark slightly in front of the center of the rod. Similarly, when fishing, it is better to choose the tension calculated from the mark slightly behind the center of the rod. Furthermore, when choosing the calculated tension value, it is best to exclude the value that is significantly affected by vibration and select the value that remains after elimination.

Next, referring to Figures 4 and 5 , a method for evaluating the performance of a fishing rod according to an embodiment of the present invention will be further described. First, referring to Figure 4 , a method for displaying (visualizing) the dynamic changes in the tension acting on the rod tip through the fishing line on the display unit 44 of the information processing device 40 along with the fishing rod will be described. Displaying (visualizing) the dynamic changes in the tension acting on the rod tip through the fishing line along with the fishing rod means that when the fishing rod display is moved, the tension acting on the rod tip through the fishing line is visually displayed (using color) on the fishing line connected to the fishing rod (this applies throughout this specification). Furthermore, in the evaluation method of one embodiment of the present invention, not just one fishing rod can be used, but multiple fishing rods can be used (this applies throughout this specification). That is, the dynamic changes in tension of not just one fishing rod but multiple fishing rods (e.g., two fishing rods) can be displayed simultaneously. This facilitates comparison between multiple fishing rods. Furthermore, in the evaluation method of one embodiment of the present invention, the dynamic changes in tension can be displayed along with the fishing rod, and the dynamic changes in curvature or the dynamic changes in strain energy at each position of the fishing rod can also be displayed along with the aforementioned fishing rod. In this way, by displaying not only tension but also the dynamic changes in curvature and strain energy, various indicators can be confirmed simultaneously. While curvature and strain energy are used as examples here, other parameters (indicators) may be used (the same applies throughout this specification). Furthermore, the supporting force and other parameters (indicators) described below may be used in place of tension (the same applies throughout this specification). Furthermore, in the evaluation method of one embodiment of the present invention, the dynamic changes in tension are displayed in two or three dimensions along with the fishing rod (displayed as two-dimensional (x, y) coordinates or three-dimensional (x, y, z) coordinates in space).

As shown, in step SA, the coordinate stiffness (EI) of each position of the fishing rod 10 is calculated. In step SB, the coordinate curvature of each position of the fishing rod 10 is calculated. In step SC, the tension acting on the tip of the fishing rod 10 via the fishing line is calculated. These steps are as described above, and further details are omitted. In step SE, in order to display (visualize) the color map (display color) in conjunction with the fishing rod on the display unit 44 of the information processing device 40, the color map usage range is specified on the display unit 44 of the information processing device 40 or by an external device via the communication unit 41. Such specified information may be appropriately stored in the memory unit 43. Specifically, each color (display color) is assigned within the numerical range of 0 to 100. To determine the range of colors to be used between the numerical range of 0 and the numerical range, the maximum value of the color map is specified. This maximum value can be set differently depending on the fishing action and type of fish being caught. This allows for a display that is appropriate for the fishing action and type of fish being caught. Here, the color map refers to a table of display colors used to visualize the amount of tension applied to the fishing rod. By specifying the range of colors to be used between the numerical range of 0 and the numerical range, the range of display colors within that table is determined.

Next, in step SF, the control unit (calculation unit) 42 of the information processing device 40 allocates the colors (display colors) in the range of 0 to the maximum value set in the above step according to the tension value in the time series data of the tension acting on the tip of the fishing rod 10 through the fishing line, and displays the tension acting on the tip of the fishing rod through the fishing line in the display unit 44. Dynamic changes in the tension and the color (display color) assigned to the tension value are displayed on the fishing line along with the rod (Figure 6 shows an example of tension changes displayed along with the rod). This allows the use of dynamic rod data to visualize the tension acting on the rod tip through the fishing line, corresponding to the actual usage and movement of the rod, enabling objective and accurate evaluation of the rod's performance.

Next, referring to FIG5 , a method for displaying (visualizing) the dynamic changes of the supporting force for holding the fishing rod in the display unit 44 of the information processing device 40 at the holding position of the fishing rod or the imaginary arm for holding the fishing rod (the imaginary arm for holding the fishing rod located at the position where the angler holds the fishing rod) will be described. Here, displaying (visualizing) the dynamic changes in the support force of the rod holding position at the rod holding position or the imaginary arm of the rod holding position (the imaginary arm that holds the rod at the position where the angler holds the rod) means that when the rod is shown to be moving, the magnitude of the support force used by the angler to support the rod at the rod holding position is visually displayed (using color) at the holding position or the imaginary arm of the rod holding position (the imaginary arm that holds the rod at the position where the angler holds the rod).

As shown, in step SD, the support force for holding the fishing rod 10 is calculated. This step is described above, and further details are omitted. In step S, in order to display (visualize) the rod's holding position or the imaginary arm at the rod's holding position (the imaginary arm holding the rod at the angler's holding position) on the display unit 44 of the information processing device 40, the range of colors (display colors) to be used in the color map is specified on the display unit 44 of the information processing device 40 or by an external device via the communication unit 41. This specified information may be appropriately stored in the memory unit 43. Specifically, each color (display color) is assigned within the numerical range of 0 to 100. To determine the color range between 0 and the numerical range to be used, the maximum value of the color map is specified. This maximum value can be set differently depending on the fishing action and type of fishing used with the fishing rod. This allows for a display that is appropriate for the fishing action and type of fishing. Here, the color map refers to a table of display colors used to visualize the strength of the holding force of the fishing rod 10. By specifying the color range between 0 and the numerical range to be used, the display color range within this table is determined.

Next, in step SF, the control unit (calculation unit) 42 of the information processing device 40 allocates each color (display color) within the range of 0 to the maximum value set in the above step according to the value of the support force in the time series data of the support force of the holding position of the fishing rod 10, and displays the dynamic change of the support force of the holding position of the fishing rod 10 and the color (display color) allocated according to the value of the support force at the position in the display unit 44. The support force of the rod can be visualized using the rod's dynamic data, corresponding to the rod's actual usage and movement, to objectively and accurately evaluate the rod's performance.

In one embodiment of the present invention, the evaluation method calculates the tension acting on the rod tip through the fishing line, or the support force holding the rod in place, by capturing time-series data of the tension acting on the rod tip through the fishing line, or the support force holding the rod in place. By utilizing this time-series data, a more objective and accurate performance evaluation of the fishing rod can be performed based on the actual usage and movement of the fishing rod.

The evaluation method according to one embodiment of the present invention is based on the action of the fishing line on the tip of the fishing rod. The performance of the fishing rod is evaluated based on the change in tension or the supporting force to maintain the position of the fishing rod and the usage of the fishing rod mentioned above. This takes into account that the performance evaluation point of view of the fishing rod will differ depending on how the fishing rod is used. In this way, the performance of the fishing rod can be evaluated more accurately based on how the fishing rod is used.

In the evaluation method of one embodiment of the present invention, the fishing rod usage is the casting action of the fishing rod.

In the evaluation method of one embodiment of the present invention, the fishing rod usage is the operation of the fishing rig or bait attached to the fishing rod.

In the evaluation method of one embodiment of the present invention, the fishing rod is used by raising and lowering the rod.

In the evaluation method of one embodiment of the present invention, the fishing rod is used in a stationary manner.

In the evaluation method of one embodiment of the present invention, the fishing rod usage is the pulling action of the fishing rod.

In the evaluation method of one embodiment of the present invention, the fishing rod usage is the fishing action of the fishing rod.

An evaluation method according to one embodiment of the present invention calculates the bending stiffness (EI) of a fishing rod at various locations between the tip and the butt of the rod; calculates the curvature of the rod at various locations between the tip and the butt of the rod when the rod is in use; calculates the distance between each of the aforementioned locations and the line of action of the rod tip; and based on the bending stiffness (EI), the aforementioned curvature, and the aforementioned distance, calculates the tension acting on the rod tip through the fishing line when the rod is in use, and displays the dynamic changes in the tension on the fishing line along with the rod.

According to one embodiment of the present invention, an evaluation method can be provided that utilizes dynamic data of a fishing rod to visualize the characteristics of the fishing rod corresponding to its actual usage and movement, thereby objectively and accurately evaluating the performance of the fishing rod.

An evaluation method according to one embodiment of the present invention calculates the bending stiffness (EI) of a fishing rod at various positions from the tip to the butt of the rod based on multiple conditions, including the load acting on the rod tip and the holding angle of the rod.

In an evaluation method according to one embodiment of the present invention, a display color of a color map assigned based on the calculated tension value is dynamically displayed on a fishing line connected to a fishing rod. Furthermore, in the evaluation method according to one embodiment of the present invention, a usage range of the display color is set by setting a value for the display color of the color map. Furthermore, in the evaluation method according to one embodiment of the present invention, the setting value is set to vary based on at least one of a fishing action or a fishing type.

An evaluation method according to one embodiment of the present invention calculates the bending stiffness (EI) of a fishing rod at various locations between the tip and the butt of the rod; obtains the coordinates of each location between the tip and the butt of the rod and the coordinates of a fishing gear connected to the rod; calculates the curvature of each location between the tip and the butt of the rod when the rod is in use; calculates the distance between each location and the line of action of the rod tip; and based on the bending stiffness (EI), the curvature, and the distance, Calculate the tension acting on the tip of the fishing rod through the fishing line when the fishing rod is in use; obtain the holding length of the fishing rod; calculate the support force of the fishing rod holding position when the fishing rod is in use based on the tension, the distance from the position of the rod butt to the line of action acting on the rod tip, and the holding length; and display the dynamic changes of the support force on the holding position of the fishing rod or on the imaginary arm of the holding position of the fishing rod (the imaginary arm that holds the fishing rod and is located at the position where the angler holds the fishing rod).

According to one embodiment of the present invention, an evaluation method can be provided that utilizes dynamic data of a fishing rod to visualize the characteristics of the fishing rod corresponding to its actual usage and movement, thereby objectively and accurately evaluating the performance of the fishing rod.

In an evaluation method according to one embodiment of the present invention, the load curves of multiple fishing rods (e.g., two fishing rods) can be configured to switch between a normal display of the load curves and an equal value display of the load curves. As described above, the load curve refers to the state (bend state) of the fishing rod when a load is applied to the fishing rod. Furthermore, the general display of the load curve refers to visually displaying the bending state of the fishing rod (bent state) when a load is applied to the fishing rod, while the equivalent display of the load curve refers to the bending state of the fishing rod, visualizing the distribution of the curvature of each part of the fishing rod and visualizing the distribution of the strain energy of each part of the fishing rod (this is assumed to be the same throughout this specification). Furthermore, this display is configured to be performed in addition to or in addition to the display of the dynamic changes in tension described above. Furthermore, this display may be configured to replace or be performed in addition to (or in addition to) displaying the aforementioned dynamic changes in the supporting force on the rod holding position or the imaginary arm holding the rod (the imaginary arm used by the angler to hold the rod). Furthermore, in any of the above or any of the following aspects, the rod holding position or the changes in the supporting force at the rod holding position may be additionally visualized using a bar graph.

According to an evaluation method according to one embodiment of the present invention, dynamic data from multiple fishing rods can be used to visualize the tension acting on the rod tip through the fishing line, the rod's holding position, or the support force of the imaginary arm holding the rod, corresponding to the actual usage and movement of the rod, along with the load curve. This allows for a more objective and accurate evaluation of the rod's performance.

In an evaluation method according to one embodiment of the present invention, the load curves of multiple fishing rods (e.g., two fishing rods) can be displayed simultaneously with a general or outline display of the load curves to more easily understand the differences in the conditions of the multiple fishing rods. Therefore, at least one of the change in curvature or the change in strain energy on the fishing rods can be displayed as a separate graph. In this case, the load curves are plotted using (x, y) two-dimensional coordinates or (x, y, z) three-dimensional coordinates in a labeled space. Furthermore, the x-axis of the graphs related to the change in curvature and the change in strain energy can be, for example, the position on the rod in the longitudinal direction of the rod when the rod is unbent. Furthermore, load curves can be displayed using spatially labeled (x, y) two-dimensional coordinates or (x, y, z) three-dimensional coordinates based on load or time variations. It is also possible to switch between load variation and time variation. Furthermore, by visually displaying the changes in the curvature and strain energy of the rod accompanying the load variation by coloring each rod part (displaying each rod part with a color assigned according to the curvature and strain energy values), the changes in curvature and strain energy can be visualized. Furthermore, load variation can be visualized in a separate bar graph. Furthermore, when comparing time variations, data related to the tension speed control applied to the fishing line attached to the rod can be used. Furthermore, this display is configured so that it can be performed in addition to or in addition to displaying the aforementioned dynamic changes in tension along with the fishing rod. Furthermore, this display is configured so that it can be performed in addition to or in addition to displaying the aforementioned dynamic changes in support force along with the rod's holding position or the imaginary arm holding the rod (the imaginary arm holding the rod that the angler uses to hold the rod).

According to an evaluation method according to one embodiment of the present invention, dynamic data from multiple fishing rods can be used to simultaneously visualize load curves and other parameters (indicators), thereby enabling a more objective and accurate evaluation of fishing rod performance.

In an evaluation method according to one embodiment of the present invention, the load curves of a plurality of fishing rods (e.g., two fishing rods) are displayed in a manner such that the loads applied to the tips of the fishing rods are in the same order, and the moment arm is displayed. Here, the moment arm refers to the distance from the lowered butt of the fishing rod to the line of action of the force applied to the tip of the fishing rod. Here, the load applied to the tip of the fishing rod is calculated based on the bending of the fishing rod. Alternatively, a measured value obtained by attaching a fishing line to a load meter may be used. Furthermore, in an evaluation method according to one embodiment of the present invention, the change in the moment arm may be displayed simultaneously with the change in the load applied to the tips of the plurality of fishing rods. When comparing multiple fishing rods (e.g., two rods), the load curves and moment arms for each rod are displayed at the same time and under the same load conditions. Therefore, it can be concluded that the shorter the moment arm, the smaller the load applied to the fisherman.

Furthermore, in an evaluation method according to an embodiment of the present invention, when displaying the load curve of a fishing rod, the position of the maximum curvature on the fishing rod can be displayed. Furthermore, in this case, the pattern of movement of the position of the maximum curvature can be displayed together with the change in the load curve of the fishing rod. By configuring in this way, the load curve can be visualized simultaneously with other parameters (indicators), thereby enabling a more objective and accurate evaluation of the performance of the fishing rod. Furthermore, in an evaluation method according to an embodiment of the present invention, when displaying the load curve of a fishing rod, the position of the maximum strain energy on the fishing rod can be displayed. Again, in this case, the pattern of movement of the position of the maximum strain energy can be displayed together with the change in the load curve of the fishing rod. This configuration allows for simultaneous visualization of the load curve and other parameters (indicators), enabling more objective and accurate evaluation of fishing rod performance.

The dimensions, materials, and configurations of the components described in this specification are not limited to those explicitly described in the embodiments. These components may be modified to have any dimensions, materials, and configurations that fall within the scope of the present invention. Furthermore, components not explicitly described in this specification may be added to the described embodiments, and some of the components described in each embodiment may be omitted.

1: Measurement system 8: Marker 10: Fishing rod 20: Plumb bob 30: Measurement camera

Claims (15)

A method for evaluating a fishing rod is characterized by: calculating the bending stiffness (EI) of the fishing rod at various locations between the tip and the butt of the fishing rod; calculating the curvature of the fishing rod at various locations between the tip and the butt of the fishing rod when the rod is in use; calculating the distance between each of the aforementioned locations and a line of action of the tip of the fishing rod; calculating the tension acting on the tip of the fishing rod through the fishing line when the rod is in use based on the bending stiffness (EI), the aforementioned curvature, and the aforementioned distance; and displaying the dynamic changes in the aforementioned tension together with the fishing rod. The evaluation method for a fishing rod as recited in claim 1 calculates the bending stiffness (EI) of the fishing rod at various positions from the tip to the butt of the fishing rod based on a plurality of conditions including the load acting on the tip of the fishing rod and the angle at which the fishing rod is held. A method for evaluating a fishing rod as claimed in claim 1, wherein the display color of the color map assigned according to the calculated value of the tension is dynamically displayed on the aforementioned fishing line connected to the aforementioned fishing rod. As in the fishing rod evaluation method of claim 3, the usage range of the display color is set by setting the display color value of the aforementioned color map. As in claim 4, the evaluation method for a fishing rod, wherein the aforementioned setting value is set to be different according to at least one of the fishing action or the fishing type. The evaluation method of claim 5, wherein the aforementioned fishing action is the casting action of the aforementioned fishing rod. The evaluation method of claim 5, wherein the fishing action is the operation of the fishing gear or bait provided on the fishing rod. The evaluation method of claim 5, wherein the aforementioned fishing action is the combined action of raising the fishing rod. The evaluation method of claim 5, wherein the aforementioned fishing action is a fixed action of the aforementioned fishing rod. The evaluation method of claim 5, wherein the aforementioned fishing action is the pulling action of the aforementioned fishing rod. As in the evaluation method of claim 5, the aforementioned fishing action is the aforementioned fishing rod's action of catching fish. The evaluation method of claim 1, wherein the aforementioned fishing rods are multiple fishing rods. An evaluation method as claimed in claim 1, wherein the dynamic change of the tension is displayed together with the fishing rod, and the dynamic change of the curvature or the dynamic change of at least any one of the strain energy at each position of the fishing rod is displayed together with the fishing rod. An evaluation method as claimed in claim 1, wherein the dynamic changes of the tension are displayed in two or three dimensions together with the fishing rod. A method for evaluating a fishing rod is characterized by: calculating the bending stiffness (EI) of the fishing rod at various locations between the tip and the butt of the fishing rod; obtaining the coordinates of each location between the tip and the butt of the fishing rod and the coordinates of a fishing gear connected to the fishing rod; calculating the curvature of the fishing rod at various locations between the tip and the butt of the fishing rod when the fishing rod is in use; calculating the distance between each of the aforementioned locations and a line of action of the tip of the fishing rod; calculating the tension acting on the tip of the fishing rod through the fishing line when the fishing rod is in use based on the bending stiffness (EI), the aforementioned curvature, and the aforementioned distance; and obtaining the retained length of the fishing rod; Based on the tension, the distance from the butt of the fishing rod to the line of action acting on the tip of the rod, and the holding length, the support force for maintaining the rod's position when the rod is in use is calculated. The dynamic changes in the support force are displayed together with the fishing rod.